The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1988
Filed:
May. 08, 1987
James A Salsgiver, Sarver, PA (US);
Eugene W Bartel, Robinson Township, Allegheny County, PA (US);
Rowland C Rudolf, III, Ben Avon, PA (US);
Allegheny Ludlum Corporation, Pittsburgh, PA (US);
Abstract
A method and apparatus are provided for domain refinement of texture annealed and insulation coated grain-oriented silicon steel strip by contacting the insulated steel surface to be scribed with a discharge electrode, moving the electrode substantially transverse to the rolling directioln while essentially maintaining contact, and marking the steel with a plurality of electrical discharge craters generally aligned across the steel by producing a plurality of electrical discharges between the electrode and steel from a capacitor of 0.001-10.0 microfarads.